Beauty semi-leptonic branching ratios

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Recent measurements of inclusive and exclusive semi-leptonic b branching ratios are reviewed. Model-independent analyses from ARGUS and CLEO confirm the value BR(b → ℓvX) = 10.4%, while new analyses from ALEPH obtain higher values above 11%. The difference is not consistent with measured values of b hadron lifetime. New measurements of BR(B → D* ℓv) from CLEO and ALEPH are in good agreement. First measurements of B → D* πℓv branching ratios from OPAL, DELPHI, and ALEPH confirm indirect evidence for a large D** component in semi-leptonic B decays.

Original languageEnglish (US)
Pages (from-to)851-861
Number of pages11
JournalNuovo Cimento della Societa Italiana di Fisica A
Issue number7
StatePublished - Jun 1 1996

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Astronomy and Astrophysics


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